Answer:
BC ≈ 3.3
Step-by-step explanation:
Using the tangent ratio in the right triangle.
tan A = [tex]\frac{opposite}{adjacent}[/tex] , that is
tan20° = [tex]\frac{BC}{AB}[/tex] = [tex]\frac{BC}{9}[/tex] ( multiply both sides by 9 )
9 × tan20° = BC , then
BC ≈ 3.3 ( to the nearest tenth )
